Tehran University of Medical Sciences Frontiers in Dentistry 2676-296X 18 0 2022 01 04 3120 3120 Hamidreza Barikani Phd, Dental Implant Research Center, Tehran University of Medical Sciences Tehran, Iran. Mohadeseh Heidari Dental Implant Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran Mohammadjavad Kharazifard Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran Amirreza Rokn Professor, Dental Implant Research Center, Periodontics Department, Tehran university of medical sciences, Tehran, Iran 2019 04 30 2021 03 11 Objectives: Dental implants are a prominent scientific breakthrough and are frequently applied for replacement of the missing teeth. From the clinicians’ point of view, long-term studies are essential to find out the predictability of dental implant systems. Materials and Methods: In this retrospective study, 1,626 patients who received 4,389 Dyna implants in a private office between 2013-2019 were evaluated. All statistical analyses were performed using SPSS 25 for Windows. P values less than 0.1 were considered significant for regression analysis. Results: Dyna implant ts (4389) placed from 2013 to 2019 were evaluated in this study. One-hundred and thirty-three (3.03%) implants failed during the healing period or recall visits. Eighty-nine implants (2.03%) failed immediately and 44 (1%) failed after 3 months. Conclusion: The present study showed that the Dyna dental implant system had high implant survival, and it had all the survival criteria similar to world-class dental implant systems.   Keywords: Dental Implants; Survival; Retrospective Studies https://fid.tums.ac.ir/index.php/fid/article/view/3120